Novak Djokovic falls to Janko Tipsarevic in the Madrid quarterfinals.
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MADRID (AP) -- Top-ranked Novak Djokovic was upset by fellow Serb Janko Tipsarevic 7-6 (2), 6-3 in the Madrid Open quarterfinals on Friday, becoming the latest top seed to lose on the new blue-clay court.
Tipsarevic forced the first-set tiebreaker before outplaying the defending champion in the second set.
It was Tipsarevic's second win in five meetings with Djokovic, who hadn't exited a tournament this early since November at the Paris Masters.
Second-seeded Nadal said he wouldn't return to the event unless it reinstalled to the traditional red clay after losing to Fernando Verdasco on Thursday. Djokovic agreed with the Spanish clay-court specialist, saying that the experimental surface was slippery.